Maciej W. Rozycki wrote:
On Mon, 7 Nov 2005, Zachary Amsden wrote:While this is at least no worse in the nested fault case than earlier kernels, I really wish I had one of those weird 486s so I could test the faulting mechanism. It seems the trap handling code has gotten quiteWhat's so weird about 486s? Besides, for testing it doesn't have to be one -- you will get away with a 386, too. I have neither anymore, but there are people around still using them.
Because I hold in my hand "i486 Microprocessor Programmer's Reference Manual, c 1990", and it has no mention whatsoever of CR4, and all documentation I had until Friday had either no mention of CR4, or something to the effect of "new on Pentium, the CR4 register ..." So I've had to re-adjust my definition of 486, which was weird.
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